Storage battery



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Oct. 9, 1928.

Ftented Oct. 9, 1928.

UNITED STATES PATE-NT OFFICE.

ALFRED P. WOOD, OF MINNEAPOLI'MINNESOTA, ASSIGNOROF FORTY-NINE ONE-H'UNDREDTHS TO FRANCIS L. MURRAY, OF MINNEAPOLIS, MINNESOTA.

STORAGE BATTERY.

Application led April 30, 1927. ySerial No. 187,843.

My invention relates to storage batteries and an object is 'to providemeans whichtends to eliminate plate buckling and which also tends toprevent the plate separators from wearing out due to plates rubbing`against the separators. It is well-known that as. a motor vehiclebounces and bounds over the road the battery is constantly bounding,with the result that the elements in the battery are subjected tovibration and wear. The positive and negative plates in the cellconstantly rub the separators. After the separators become worn so as tono longer afford suthcient support for the plates, the vlatter buckle inthe center, thereby throwing the corners sharply against the separators.The result is that the buckled plate then cuts through what remains ofthe separator and renders the cell inactive on account of shortorcuiting. By the employment. of my .invention any vibration whichoccurs will cause the entire cell to vibrate in complete unison, therebyeliminating unnecessary wear on the separators. Plate buckling isfurther prevented due to the provision of a support at the exact placewhere all plates of this kind tend to buckle, which is at the center.vThe center of the plate being the' weakest place naturally means that itwill buckle there first. rIherefore, by placing a support at the centerof the plate this weakness is overcome and the entire plate is greatlystrengthened.

rlhe full objects and advantages of my invention will appear inconnection with the detailed description thereof, and the novel featuresof my inventive idea willbe'particularly pointed out in the claim.

In the accompanying` drawings, which illustrate the application of myinvention in two slightly different forms,

Fig. l is an elevational view showing a complete cell element having myinvention applied thereto. Fig. 2 is an elevational view of one of theseparators. Fig. 3 is aview on an enlarged scale in section on the line3 3 of Fig. l. Fig. 4 is a fragmentary view corresponding to Fig. 3 butsho ving aslight modification.

Referring to the construction shown in thel age battery cell, while theseparators are des-V through the ring 30.

ignated by the numeral 14. As shown, the

plates are in the customary form of grids with paste between the grids.The plates are surrounded by frame portions I6, the frames of thepositive plates being connected by a strap 18 which carries a post 20,and 'the frames of the negative platesv being connected by a strap 22which carries a post 24.`

heads 32 and 34 of two cooperating bolt members 33 and 38, the inner endof the member 38 having an internally-threaded socket 40,

receive threads on the inner end of the mem` ber 3 6. The bolt membersare made of nonconducting material such as Celluloid, glass or amber. Inthe form shown in Fig. 4 there 1s a one-part bolt 44 having a head 32 atone endy engaging the ring 28', and at the other end having a reducedthreaded portion 46 which engagesy internal threads t It will be notedthat the rings 1n the twoV outside plates are placed at their yweakestplace, and that pressure is distributed'over a large area, whichfurthertends to eliminate the of the plates.

I claim:

In a storage battery cell, the combination of positive and negativeplates, separators for said plates, lead rings cast in place at thecenters of the two outside plates, said rings having outwardly inclinedopenings therein, and two cooperating bolt members, of non-conductingmaterial vhaving screwthreaded engagement with each other at theiradjacent ends,'said bolt members passing centrally through all of theplates and separators and having inclined heads which lit into saidinclined openings. Y Y

In testimony whereof I hereunto affix my signature.

ALFRED P. WOOD.

possibility of buckling

